Home / 7,112.85-9,815.73-3,926.34

Finding the Fourth Proportional to 7,112.85, 9,815.73 and 3,926.34

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Solution

The fourth proportional to 7,112.85, 9,815.73 and 3,926.34 is: 5,418.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.85 : 9,815.73 = 3,926.34 : x
  2. Step 2: Convert to fraction form
    7,112.85/9,815.73 = 3,926.34/x
  3. Step 3: Cross multiply
    7,112.85x = 9,815.73 × 3,926.34
  4. Step 4: Simplify right side
    7,112.85x = 38,539,893.33
  5. Step 5: Solve for x
    x = 38,539,893.33/7,112.85
  6. Step 6: Final answer
    x = 5,418.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.